前面已经写了手机APP支付宝支付，今天再把手机APP微信支付补上，前期的准备工作在这里就不多说了，可以参考微信支付开发文档，一定要仔细阅读开发文档，可以让你少踩点坑；准备工作完成后就是配置参数,调用统一下单接口,支付后异步回调三部曲啦；
1.我封装好的一个支付类文件,多余的东西都去除掉了,并且把配置参数放到了这个支付类中,只需要修改Weixinpayandroid方法内的几个参数就可以直接复制使用:
class Wxpayandroid { //参数配置 public $config = array( 'appid' => "", /*微信开放平台上的应用id*/ 'mch_id' => "", /*微信申请成功之后邮件中的商户id*/ 'api_key' => "", /*在微信商户平台上自己设定的api密钥 32位*/ ); //服务器异步通知页面路径(必填) public $notify_url = ''; //商户订单号(必填，商户网站订单系统中唯一订单号) public $out_trade_no = ''; //商品描述(必填，不填则为商品名称) public $body = ''; //付款金额(必填) public $total_fee = 0; //自定义超时(选填，支持dhmc) public $time_expire = ''; private $WxPayHelper; public function Weixinpayandroid($total_fee,$tade_no) { $this->total_fee = intval($total_fee * 100);//订单的金额 1元 $this->out_trade_no = $tade_no;// date('YmdHis') . substr(time(), - 5) . substr(microtime(), 2, 5) . sprintf('%02d', rand(0, 99));//订单号 $this->body = 'wxpay';//支付描述信息 $this->time_expire = date('YmdHis', time() + 86400);//订单支付的过期时间(eg:一天过期) $this->notify_url = "http://www.ceshi.com/notifyandroid";//异步通知URL(更改支付状态) //数据以JSON的形式返回给APP $app_response = $this->doPay(); if (isset($app_response['return_code']) && $app_response['return_code'] == 'FAIL') { $errorCode = 100; $errorMsg = $app_response['return_msg']; $this->echoResult($errorCode, $errorMsg); } else { $errorCode = 0; $errorMsg = 'success'; $responseData = array( 'notify_url' => $this->notify_url, 'app_response' => $app_response, ); $this->echoResult($errorCode, $errorMsg, $responseData); } } //接口输出 function echoResult($errorCode = 0, $errorMsg = 'success', $responseData = array()) { $arr = array( 'errorCode' => $errorCode, 'errorMsg' => $errorMsg, 'responseData' => $responseData, ); exit(json_encode($arr)); //exit可以正常发送给APP json数据 // return json_encode($arr); //在TP5中return这个json数据，APP接收到的是null,无法正常吊起微信支付 } function getVerifySign($data, $key) { $String = $this->formatParameters($data, false); //签名步骤二：在string后加入KEY $String = $String . "&key=" . $key; //签名步骤三：MD5加密 $String = md5($String); //签名步骤四：所有字符转为大写 $result = strtoupper($String); return $result; } function formatParameters($paraMap, $urlencode) { $buff = ""; ksort($paraMap); foreach ($paraMap as $k => $v) { if($k=="sign"){ continue; } if ($urlencode) { $v = urlencode($v); } $buff .= $k . "=" . $v . "&"; } $reqPar; if (strlen($buff) > 0) { $reqPar = substr($buff, 0, strlen($buff) - 1); } return $reqPar; } /** * 得到签名 * @param object $obj * @param string $api_key * @return string */ function getSign($obj, $api_key) { foreach ($obj as $k => $v) { $Parameters[strtolower($k)] = $v; } //签名步骤一：按字典序排序参数 ksort($Parameters); $String = $this->formatBizQueryParaMap($Parameters, false); //签名步骤二：在string后加入KEY $String = $String."&key=".$api_key; //签名步骤三：MD5加密 $result = strtoupper(md5($String)); return $result; } /** * 获取指定长度的随机字符串 * @param int $length * @return Ambigous <NULL, string> */ function getRandChar($length){ $str = null; $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz"; $max = strlen($strPol)-1; for($i=0;$i<$length;$i++){ $str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数 } return $str; } /** * 数组转xml * @param array $arr * @return string */ function arrayToXml($arr) { $xml = "<xml>"; foreach ($arr as $key=>$val) { if (is_numeric($val)) { $xml.="<".$key.">".$val."</".$key.">"; } else $xml.="<".$key."><![CDATA[".$val."]]></".$key.">"; } $xml.="</xml>"; return $xml; } /** * 以post方式提交xml到对应的接口url * * @param string $xml 需要post的xml数据 * @param string $url url * @param bool $useCert 是否需要证书，默认不需要 * @param int $second url执行超时时间，默认30s * @throws WxPayException */ function postXmlCurl($xml, $url, $second=30, $useCert=false, $sslcert_path='', $sslkey_path='') { $ch = curl_init(); //设置超时 curl_setopt($ch, CURLOPT_TIMEOUT, $second); curl_setopt($ch,CURLOPT_URL, $url); //设置header curl_setopt($ch, CURLOPT_HEADER, FALSE); //要求结果为字符串且输出到屏幕上 curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE); curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE); if($useCert == true){ curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,TRUE); curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);//严格校验 //设置证书 //使用证书：cert 与 key 分别属于两个.pem文件 curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM'); curl_setopt($ch,CURLOPT_SSLCERT, $sslcert_path); curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM'); curl_setopt($ch,CURLOPT_SSLKEY, $sslkey_path); } //post提交方式 curl_setopt($ch, CURLOPT_POST, TRUE); curl_setopt($ch, CURLOPT_POSTFIELDS, $xml); //运行curl $data = curl_exec($ch); //返回结果 if($data){ curl_close($ch); return $data; } else { $error = curl_errno($ch); curl_close($ch); return false; } } /** * 获取当前服务器的IP * @return Ambigous <string, unknown> */ function get_client_ip() { if (isset($_SERVER['REMOTE_ADDR'])) { $cip = $_SERVER['REMOTE_ADDR']; } elseif (getenv("REMOTE_ADDR")) { $cip = getenv("REMOTE_ADDR"); } elseif (getenv("HTTP_CLIENT_IP")) { $cip = getenv("HTTP_CLIENT_IP"); } else { $cip = "127.0.0.1"; } return $cip; } /** * 将数组转成uri字符串 * @param array $paraMap * @param bool $urlencode * @return string */ function formatBizQueryParaMap($paraMap, $urlencode) { $buff = ""; ksort($paraMap); foreach ($paraMap as $k => $v) { if($urlencode) { $v = urlencode($v); } $buff .= strtolower($k) . "=" . $v . "&"; } $reqPar; if (strlen($buff) > 0) { $reqPar = substr($buff, 0, strlen($buff)-1); } return $reqPar; } /** * XML转数组 * @param unknown $xml * @return mixed */ function xmlToArray($xml) { //将XML转为array $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true); return $array_data; } public function chkParam() { //用户网站订单号 if (empty($this->out_trade_no)) { die('out_trade_no error'); } //商品描述 if (empty($this->body)) { die('body error'); } if (empty($this->time_expire)){ die('time_expire error'); } //检测支付金额 if (empty($this->total_fee) || !is_numeric($this->total_fee)) { die('total_fee error'); } //异步通知URL if (empty($this->notify_url)) { die('notify_url error'); } if (!preg_match("#^http:\/\/#i", $this->notify_url)) { $this->notify_url = "http://" . $_SERVER['HTTP_HOST'] . $this->notify_url; } return true; } /** * 生成支付(返回给APP) * @return boolean|mixed */ public function doPay() { //检测构造参数 $this->chkParam(); return $this->createAppPara(); } /** * APP统一下单 */ private function createAppPara() { $url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; $data["appid"] = $this->config['appid'];//微信开放平台审核通过的应用APPID $data["body"] = $this->body;//商品或支付单简要描述 $data["mch_id"] = $this->config['mch_id'];//商户号 $data["nonce_str"] = $this->getRandChar(32);//随机字符串 $data["notify_url"] = $this->notify_url;//通知地址 $data["out_trade_no"] = $this->out_trade_no;//商户订单号 $data["spbill_create_ip"] = $this->get_client_ip();//终端IP $data["total_fee"] = $this->total_fee;//总金额 $data["time_expire"] = $this->time_expire;//交易结束时间 $data["trade_type"] = "APP";//交易类型 $data["sign"] = $this->getSign($data, $this->config['api_key']);//签名 $xml = $this->arrayToXml($data); $response = $this->postXmlCurl($xml, $url); //将微信返回的结果xml转成数组 $responseArr = $this->xmlToArray($response); if(isset($responseArr["return_code"]) && $responseArr["return_code"]=='SUCCESS'){ return $this->getOrder($responseArr['prepay_id']); } return $responseArr; } /** * 执行第二次签名，才能返回给客户端使用 * @param int $prepayId:预支付交易会话标识 * @return array */ public function getOrder($prepayId) { $data["appid"] = $this->config['appid']; $data["noncestr"] = $this->getRandChar(32); $data["package"] = "Sign=WXPay"; $data["partnerid"] = $this->config['mch_id']; $data["prepayid"] = $prepayId; $data["timestamp"] = time(); $data["sign"] = $this->getSign($data, $this->config['api_key']); $data["packagestr"] = "Sign=WXPay"; return $data; } /** * 异步通知信息验证 * @return boolean|mixed */ public function verifyNotify() { $xml = isset($GLOBALS['HTTP_RAW_POST_DATA']) ? $GLOBALS['HTTP_RAW_POST_DATA'] : ''; if(!$xml){ return false; } $wx_back = $this->xmlToArray($xml); if(empty($wx_back)){ return false; } $checkSign = $this->getVerifySign($wx_back, $this->config['api_key']); if($checkSign=$wx_back['sign']){ return $wx_back; }else{ return false; } } }